21223720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{331}}^1$

素因数の和:578

約数の個数: 64

約数和(自身を含む): 54979200

約数和(自身を除く): 33755480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 229, 280, 331, 458, 662, 916, 1145, 1324, 1603, 1655, 1832, 2290, 2317, 2648, 3206, 3310, 4580, 4634, 6412, 6620, 8015, 9160, 9268, 11585, 12824, 13240, 16030, 18536, 23170, 32060, 46340, 64120, 75799, 92680, 151598, 303196, 378995, 530593, 606392, 757990, 1061186, 1515980, 2122372, 2652965, 3031960, 4244744, 5305930, 10611860, 21223720]

約数ペア:

[(1, 21223720), (2, 10611860), (4, 5305930), (5, 4244744), (7, 3031960), (8, 2652965), (10, 2122372), (14, 1515980), (20, 1061186), (28, 757990), (35, 606392), (40, 530593), (56, 378995), (70, 303196), (140, 151598), (229, 92680), (280, 75799), (331, 64120), (458, 46340), (662, 32060), (916, 23170), (1145, 18536), (1324, 16030), (1603, 13240), (1655, 12824), (1832, 11585), (2290, 9268), (2317, 9160), (2648, 8015), (3206, 6620), (3310, 6412), (4580, 4634)]