21315910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:122

約数の個数: 128

約数和(自身を含む): 53084160

約数和(自身を除く): 31768250

約数列:

[1, 2, 5, 7, 10, 11, 14, 19, 22, 31, 35, 38, 47, 55, 62, 70, 77, 94, 95, 110, 133, 154, 155, 190, 209, 217, 235, 266, 310, 329, 341, 385, 418, 434, 470, 517, 589, 658, 665, 682, 770, 893, 1034, 1045, 1085, 1178, 1330, 1457, 1463, 1645, 1705, 1786, 2090, 2170, 2387, 2585, 2914, 2926, 2945, 3290, 3410, 3619, 4123, 4465, 4774, 5170, 5890, 6251, 6479, 7238, 7285, 7315, 8246, 8930, 9823, 10199, 11935, 12502, 12958, 14570, 14630, 16027, 18095, 19646, 20398, 20615, 23870, 27683, 31255, 32054, 32395, 36190, 41230, 45353, 49115, 50995, 55366, 62510, 64790, 68761, 80135, 90706, 98230, 101990, 112189, 137522, 138415, 160270, 193781, 224378, 226765, 276830, 304513, 343805, 387562, 453530, 560945, 609026, 687610, 968905, 1121890, 1522565, 1937810, 2131591, 3045130, 4263182, 10657955, 21315910]

約数ペア:

[(1, 21315910), (2, 10657955), (5, 4263182), (7, 3045130), (10, 2131591), (11, 1937810), (14, 1522565), (19, 1121890), (22, 968905), (31, 687610), (35, 609026), (38, 560945), (47, 453530), (55, 387562), (62, 343805), (70, 304513), (77, 276830), (94, 226765), (95, 224378), (110, 193781), (133, 160270), (154, 138415), (155, 137522), (190, 112189), (209, 101990), (217, 98230), (235, 90706), (266, 80135), (310, 68761), (329, 64790), (341, 62510), (385, 55366), (418, 50995), (434, 49115), (470, 45353), (517, 41230), (589, 36190), (658, 32395), (665, 32054), (682, 31255), (770, 27683), (893, 23870), (1034, 20615), (1045, 20398), (1085, 19646), (1178, 18095), (1330, 16027), (1457, 14630), (1463, 14570), (1645, 12958), (1705, 12502), (1786, 11935), (2090, 10199), (2170, 9823), (2387, 8930), (2585, 8246), (2914, 7315), (2926, 7285), (2945, 7238), (3290, 6479), (3410, 6251), (3619, 5890), (4123, 5170), (4465, 4774)]