21803880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:379

約数の個数: 128

約数和(自身を含む): 75790080

約数和(自身を除く): 53986200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 101, 105, 120, 140, 168, 202, 210, 257, 280, 303, 404, 420, 505, 514, 606, 707, 771, 808, 840, 1010, 1028, 1212, 1285, 1414, 1515, 1542, 1799, 2020, 2056, 2121, 2424, 2570, 2828, 3030, 3084, 3535, 3598, 3855, 4040, 4242, 5140, 5397, 5656, 6060, 6168, 7070, 7196, 7710, 8484, 8995, 10280, 10605, 10794, 12120, 14140, 14392, 15420, 16968, 17990, 21210, 21588, 25957, 26985, 28280, 30840, 35980, 42420, 43176, 51914, 53970, 71960, 77871, 84840, 103828, 107940, 129785, 155742, 181699, 207656, 215880, 259570, 311484, 363398, 389355, 519140, 545097, 622968, 726796, 778710, 908495, 1038280, 1090194, 1453592, 1557420, 1816990, 2180388, 2725485, 3114840, 3633980, 4360776, 5450970, 7267960, 10901940, 21803880]

約数ペア:

[(1, 21803880), (2, 10901940), (3, 7267960), (4, 5450970), (5, 4360776), (6, 3633980), (7, 3114840), (8, 2725485), (10, 2180388), (12, 1816990), (14, 1557420), (15, 1453592), (20, 1090194), (21, 1038280), (24, 908495), (28, 778710), (30, 726796), (35, 622968), (40, 545097), (42, 519140), (56, 389355), (60, 363398), (70, 311484), (84, 259570), (101, 215880), (105, 207656), (120, 181699), (140, 155742), (168, 129785), (202, 107940), (210, 103828), (257, 84840), (280, 77871), (303, 71960), (404, 53970), (420, 51914), (505, 43176), (514, 42420), (606, 35980), (707, 30840), (771, 28280), (808, 26985), (840, 25957), (1010, 21588), (1028, 21210), (1212, 17990), (1285, 16968), (1414, 15420), (1515, 14392), (1542, 14140), (1799, 12120), (2020, 10794), (2056, 10605), (2121, 10280), (2424, 8995), (2570, 8484), (2828, 7710), (3030, 7196), (3084, 7070), (3535, 6168), (3598, 6060), (3855, 5656), (4040, 5397), (4242, 5140)]