21189740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:303

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 33000340

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 31, 44, 52, 55, 62, 65, 110, 124, 130, 143, 155, 220, 239, 260, 286, 310, 341, 403, 478, 572, 620, 682, 715, 806, 956, 1195, 1364, 1430, 1612, 1705, 2015, 2390, 2629, 2860, 3107, 3410, 4030, 4433, 4780, 5258, 6214, 6820, 7409, 8060, 8866, 10516, 12428, 13145, 14818, 15535, 17732, 22165, 26290, 29636, 31070, 34177, 37045, 44330, 52580, 62140, 68354, 74090, 81499, 88660, 96317, 136708, 148180, 162998, 170885, 192634, 325996, 341770, 385268, 407495, 481585, 683540, 814990, 963170, 1059487, 1629980, 1926340, 2118974, 4237948, 5297435, 10594870, 21189740]

約数ペア:

[(1, 21189740), (2, 10594870), (4, 5297435), (5, 4237948), (10, 2118974), (11, 1926340), (13, 1629980), (20, 1059487), (22, 963170), (26, 814990), (31, 683540), (44, 481585), (52, 407495), (55, 385268), (62, 341770), (65, 325996), (110, 192634), (124, 170885), (130, 162998), (143, 148180), (155, 136708), (220, 96317), (239, 88660), (260, 81499), (286, 74090), (310, 68354), (341, 62140), (403, 52580), (478, 44330), (572, 37045), (620, 34177), (682, 31070), (715, 29636), (806, 26290), (956, 22165), (1195, 17732), (1364, 15535), (1430, 14818), (1612, 13145), (1705, 12428), (2015, 10516), (2390, 8866), (2629, 8060), (2860, 7409), (3107, 6820), (3410, 6214), (4030, 5258), (4433, 4780)]