21013164

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1051

約数の個数: 72

約数和(自身を含む): 57774080

約数和(自身を除く): 36760916

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 31, 36, 38, 57, 62, 76, 93, 114, 124, 171, 186, 228, 279, 342, 372, 558, 589, 684, 991, 1116, 1178, 1767, 1982, 2356, 2973, 3534, 3964, 5301, 5946, 7068, 8919, 10602, 11892, 17838, 18829, 21204, 30721, 35676, 37658, 56487, 61442, 75316, 92163, 112974, 122884, 169461, 184326, 225948, 276489, 338922, 368652, 552978, 583699, 677844, 1105956, 1167398, 1751097, 2334796, 3502194, 5253291, 7004388, 10506582, 21013164]

約数ペア:

[(1, 21013164), (2, 10506582), (3, 7004388), (4, 5253291), (6, 3502194), (9, 2334796), (12, 1751097), (18, 1167398), (19, 1105956), (31, 677844), (36, 583699), (38, 552978), (57, 368652), (62, 338922), (76, 276489), (93, 225948), (114, 184326), (124, 169461), (171, 122884), (186, 112974), (228, 92163), (279, 75316), (342, 61442), (372, 56487), (558, 37658), (589, 35676), (684, 30721), (991, 21204), (1116, 18829), (1178, 17838), (1767, 11892), (1982, 10602), (2356, 8919), (2973, 7068), (3534, 5946), (3964, 5301)]