21701860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:157

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 30552860

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 31, 34, 58, 62, 68, 71, 85, 116, 124, 142, 145, 155, 170, 284, 290, 310, 340, 355, 493, 527, 580, 620, 710, 899, 986, 1054, 1207, 1420, 1798, 1972, 2059, 2108, 2201, 2414, 2465, 2635, 3596, 4118, 4402, 4495, 4828, 4930, 5270, 6035, 8236, 8804, 8990, 9860, 10295, 10540, 11005, 12070, 15283, 17980, 20590, 22010, 24140, 30566, 35003, 37417, 41180, 44020, 61132, 63829, 70006, 74834, 76415, 127658, 140012, 149668, 152830, 175015, 187085, 255316, 305660, 319145, 350030, 374170, 638290, 700060, 748340, 1085093, 1276580, 2170186, 4340372, 5425465, 10850930, 21701860]

約数ペア:

[(1, 21701860), (2, 10850930), (4, 5425465), (5, 4340372), (10, 2170186), (17, 1276580), (20, 1085093), (29, 748340), (31, 700060), (34, 638290), (58, 374170), (62, 350030), (68, 319145), (71, 305660), (85, 255316), (116, 187085), (124, 175015), (142, 152830), (145, 149668), (155, 140012), (170, 127658), (284, 76415), (290, 74834), (310, 70006), (340, 63829), (355, 61132), (493, 44020), (527, 41180), (580, 37417), (620, 35003), (710, 30566), (899, 24140), (986, 22010), (1054, 20590), (1207, 17980), (1420, 15283), (1798, 12070), (1972, 11005), (2059, 10540), (2108, 10295), (2201, 9860), (2414, 8990), (2465, 8804), (2635, 8236), (3596, 6035), (4118, 5270), (4402, 4930), (4495, 4828)]