21051316

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{149}}^1$

素因数の和:209

約数の個数: 72

約数和(自身を含む): 46116000

約数和(自身を除く): 25064684

約数列:

[1, 2, 4, 11, 13, 19, 22, 26, 38, 44, 52, 76, 143, 149, 169, 209, 247, 286, 298, 338, 418, 494, 572, 596, 676, 836, 988, 1639, 1859, 1937, 2717, 2831, 3211, 3278, 3718, 3874, 5434, 5662, 6422, 6556, 7436, 7748, 10868, 11324, 12844, 21307, 25181, 31141, 35321, 36803, 42614, 50362, 62282, 70642, 73606, 85228, 100724, 124564, 141284, 147212, 276991, 404833, 478439, 553982, 809666, 956878, 1107964, 1619332, 1913756, 5262829, 10525658, 21051316]

約数ペア:

[(1, 21051316), (2, 10525658), (4, 5262829), (11, 1913756), (13, 1619332), (19, 1107964), (22, 956878), (26, 809666), (38, 553982), (44, 478439), (52, 404833), (76, 276991), (143, 147212), (149, 141284), (169, 124564), (209, 100724), (247, 85228), (286, 73606), (298, 70642), (338, 62282), (418, 50362), (494, 42614), (572, 36803), (596, 35321), (676, 31141), (836, 25181), (988, 21307), (1639, 12844), (1859, 11324), (1937, 10868), (2717, 7748), (2831, 7436), (3211, 6556), (3278, 6422), (3718, 5662), (3874, 5434)]