21021520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:113

約数の個数: 160

約数和(自身を含む): 59058720

約数和(自身を除く): 38037200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 29, 34, 40, 41, 52, 58, 65, 68, 80, 82, 85, 104, 116, 130, 136, 145, 164, 170, 205, 208, 221, 232, 260, 272, 290, 328, 340, 377, 410, 442, 464, 493, 520, 533, 580, 656, 680, 697, 754, 820, 884, 986, 1040, 1066, 1105, 1160, 1189, 1360, 1394, 1508, 1640, 1768, 1885, 1972, 2132, 2210, 2320, 2378, 2465, 2665, 2788, 3016, 3280, 3485, 3536, 3770, 3944, 4264, 4420, 4756, 4930, 5330, 5576, 5945, 6032, 6409, 6970, 7540, 7888, 8528, 8840, 9061, 9512, 9860, 10660, 11152, 11890, 12818, 13940, 15080, 15457, 17680, 18122, 19024, 19720, 20213, 21320, 23780, 25636, 27880, 30160, 30914, 32045, 36244, 39440, 40426, 42640, 45305, 47560, 51272, 55760, 61828, 64090, 72488, 77285, 80852, 90610, 95120, 101065, 102544, 123656, 128180, 144976, 154570, 161704, 181220, 202130, 247312, 256360, 262769, 309140, 323408, 362440, 404260, 512720, 525538, 618280, 724880, 808520, 1051076, 1236560, 1313845, 1617040, 2102152, 2627690, 4204304, 5255380, 10510760, 21021520]

約数ペア:

[(1, 21021520), (2, 10510760), (4, 5255380), (5, 4204304), (8, 2627690), (10, 2102152), (13, 1617040), (16, 1313845), (17, 1236560), (20, 1051076), (26, 808520), (29, 724880), (34, 618280), (40, 525538), (41, 512720), (52, 404260), (58, 362440), (65, 323408), (68, 309140), (80, 262769), (82, 256360), (85, 247312), (104, 202130), (116, 181220), (130, 161704), (136, 154570), (145, 144976), (164, 128180), (170, 123656), (205, 102544), (208, 101065), (221, 95120), (232, 90610), (260, 80852), (272, 77285), (290, 72488), (328, 64090), (340, 61828), (377, 55760), (410, 51272), (442, 47560), (464, 45305), (493, 42640), (520, 40426), (533, 39440), (580, 36244), (656, 32045), (680, 30914), (697, 30160), (754, 27880), (820, 25636), (884, 23780), (986, 21320), (1040, 20213), (1066, 19720), (1105, 19024), (1160, 18122), (1189, 17680), (1360, 15457), (1394, 15080), (1508, 13940), (1640, 12818), (1768, 11890), (1885, 11152), (1972, 10660), (2132, 9860), (2210, 9512), (2320, 9061), (2378, 8840), (2465, 8528), (2665, 7888), (2788, 7540), (3016, 6970), (3280, 6409), (3485, 6032), (3536, 5945), (3770, 5576), (3944, 5330), (4264, 4930), (4420, 4756)]