20808320

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:134

約数の個数: 128

約数和(自身を含む): 55777680

約数和(自身を除く): 34969360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 61, 64, 65, 80, 82, 104, 122, 128, 130, 160, 164, 205, 208, 244, 260, 305, 320, 328, 410, 416, 488, 520, 533, 610, 640, 656, 793, 820, 832, 976, 1040, 1066, 1220, 1312, 1586, 1640, 1664, 1952, 2080, 2132, 2440, 2501, 2624, 2665, 3172, 3280, 3904, 3965, 4160, 4264, 4880, 5002, 5248, 5330, 6344, 6560, 7808, 7930, 8320, 8528, 9760, 10004, 10660, 12505, 12688, 13120, 15860, 17056, 19520, 20008, 21320, 25010, 25376, 26240, 31720, 32513, 34112, 39040, 40016, 42640, 50020, 50752, 63440, 65026, 68224, 80032, 85280, 100040, 101504, 126880, 130052, 160064, 162565, 170560, 200080, 253760, 260104, 320128, 325130, 341120, 400160, 507520, 520208, 650260, 800320, 1040416, 1300520, 1600640, 2080832, 2601040, 4161664, 5202080, 10404160, 20808320]

約数ペア:

[(1, 20808320), (2, 10404160), (4, 5202080), (5, 4161664), (8, 2601040), (10, 2080832), (13, 1600640), (16, 1300520), (20, 1040416), (26, 800320), (32, 650260), (40, 520208), (41, 507520), (52, 400160), (61, 341120), (64, 325130), (65, 320128), (80, 260104), (82, 253760), (104, 200080), (122, 170560), (128, 162565), (130, 160064), (160, 130052), (164, 126880), (205, 101504), (208, 100040), (244, 85280), (260, 80032), (305, 68224), (320, 65026), (328, 63440), (410, 50752), (416, 50020), (488, 42640), (520, 40016), (533, 39040), (610, 34112), (640, 32513), (656, 31720), (793, 26240), (820, 25376), (832, 25010), (976, 21320), (1040, 20008), (1066, 19520), (1220, 17056), (1312, 15860), (1586, 13120), (1640, 12688), (1664, 12505), (1952, 10660), (2080, 10004), (2132, 9760), (2440, 8528), (2501, 8320), (2624, 7930), (2665, 7808), (3172, 6560), (3280, 6344), (3904, 5330), (3965, 5248), (4160, 5002), (4264, 4880)]