21195468

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{349}}^1$

素因数の和:607

約数の個数: 72

約数和(自身を含む): 61661600

約数和(自身を除く): 40466132

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 241, 252, 349, 482, 698, 723, 964, 1047, 1396, 1446, 1687, 2094, 2169, 2443, 2892, 3141, 3374, 4188, 4338, 4886, 5061, 6282, 6748, 7329, 8676, 9772, 10122, 12564, 14658, 15183, 20244, 21987, 29316, 30366, 43974, 60732, 84109, 87948, 168218, 252327, 336436, 504654, 588763, 756981, 1009308, 1177526, 1513962, 1766289, 2355052, 3027924, 3532578, 5298867, 7065156, 10597734, 21195468]

約数ペア:

[(1, 21195468), (2, 10597734), (3, 7065156), (4, 5298867), (6, 3532578), (7, 3027924), (9, 2355052), (12, 1766289), (14, 1513962), (18, 1177526), (21, 1009308), (28, 756981), (36, 588763), (42, 504654), (63, 336436), (84, 252327), (126, 168218), (241, 87948), (252, 84109), (349, 60732), (482, 43974), (698, 30366), (723, 29316), (964, 21987), (1047, 20244), (1396, 15183), (1446, 14658), (1687, 12564), (2094, 10122), (2169, 9772), (2443, 8676), (2892, 7329), (3141, 6748), (3374, 6282), (4188, 5061), (4338, 4886)]