20965360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1061}}^1$

素因数の和:1106

約数の個数: 80

約数和(自身を含む): 55308960

約数和(自身を除く): 34343600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1061, 1235, 1520, 1976, 2122, 2470, 3952, 4244, 4940, 5305, 8488, 9880, 10610, 13793, 16976, 19760, 20159, 21220, 27586, 40318, 42440, 55172, 68965, 80636, 84880, 100795, 110344, 137930, 161272, 201590, 220688, 262067, 275860, 322544, 403180, 524134, 551720, 806360, 1048268, 1103440, 1310335, 1612720, 2096536, 2620670, 4193072, 5241340, 10482680, 20965360]

約数ペア:

[(1, 20965360), (2, 10482680), (4, 5241340), (5, 4193072), (8, 2620670), (10, 2096536), (13, 1612720), (16, 1310335), (19, 1103440), (20, 1048268), (26, 806360), (38, 551720), (40, 524134), (52, 403180), (65, 322544), (76, 275860), (80, 262067), (95, 220688), (104, 201590), (130, 161272), (152, 137930), (190, 110344), (208, 100795), (247, 84880), (260, 80636), (304, 68965), (380, 55172), (494, 42440), (520, 40318), (760, 27586), (988, 21220), (1040, 20159), (1061, 19760), (1235, 16976), (1520, 13793), (1976, 10610), (2122, 9880), (2470, 8488), (3952, 5305), (4244, 4940)]