21111012

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{571}}^1$

素因数の和:673

約数の個数: 72

約数和(自身を含む): 58298240

約数和(自身を除く): 37187228

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 79, 117, 156, 158, 234, 237, 316, 468, 474, 571, 711, 948, 1027, 1142, 1422, 1713, 2054, 2284, 2844, 3081, 3426, 4108, 5139, 6162, 6852, 7423, 9243, 10278, 12324, 14846, 18486, 20556, 22269, 29692, 36972, 44538, 45109, 66807, 89076, 90218, 133614, 135327, 180436, 267228, 270654, 405981, 541308, 586417, 811962, 1172834, 1623924, 1759251, 2345668, 3518502, 5277753, 7037004, 10555506, 21111012]

約数ペア:

[(1, 21111012), (2, 10555506), (3, 7037004), (4, 5277753), (6, 3518502), (9, 2345668), (12, 1759251), (13, 1623924), (18, 1172834), (26, 811962), (36, 586417), (39, 541308), (52, 405981), (78, 270654), (79, 267228), (117, 180436), (156, 135327), (158, 133614), (234, 90218), (237, 89076), (316, 66807), (468, 45109), (474, 44538), (571, 36972), (711, 29692), (948, 22269), (1027, 20556), (1142, 18486), (1422, 14846), (1713, 12324), (2054, 10278), (2284, 9243), (2844, 7423), (3081, 6852), (3426, 6162), (4108, 5139)]