21666540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{653}}^1$

素因数の和:751

約数の個数: 96

約数和(自身を含む): 70318080

約数和(自身を除く): 48651540

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 79, 84, 105, 140, 158, 210, 237, 316, 395, 420, 474, 553, 653, 790, 948, 1106, 1185, 1306, 1580, 1659, 1959, 2212, 2370, 2612, 2765, 3265, 3318, 3918, 4571, 4740, 5530, 6530, 6636, 7836, 8295, 9142, 9795, 11060, 13060, 13713, 16590, 18284, 19590, 22855, 27426, 33180, 39180, 45710, 51587, 54852, 68565, 91420, 103174, 137130, 154761, 206348, 257935, 274260, 309522, 361109, 515870, 619044, 722218, 773805, 1031740, 1083327, 1444436, 1547610, 1805545, 2166654, 3095220, 3611090, 4333308, 5416635, 7222180, 10833270, 21666540]

約数ペア:

[(1, 21666540), (2, 10833270), (3, 7222180), (4, 5416635), (5, 4333308), (6, 3611090), (7, 3095220), (10, 2166654), (12, 1805545), (14, 1547610), (15, 1444436), (20, 1083327), (21, 1031740), (28, 773805), (30, 722218), (35, 619044), (42, 515870), (60, 361109), (70, 309522), (79, 274260), (84, 257935), (105, 206348), (140, 154761), (158, 137130), (210, 103174), (237, 91420), (316, 68565), (395, 54852), (420, 51587), (474, 45710), (553, 39180), (653, 33180), (790, 27426), (948, 22855), (1106, 19590), (1185, 18284), (1306, 16590), (1580, 13713), (1659, 13060), (1959, 11060), (2212, 9795), (2370, 9142), (2612, 8295), (2765, 7836), (3265, 6636), (3318, 6530), (3918, 5530), (4571, 4740)]