20284040

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 96

約数和(自身を含む): 54172800

約数和(自身を除く): 33888760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 79, 98, 131, 140, 158, 196, 245, 262, 280, 316, 392, 395, 490, 524, 553, 632, 655, 790, 917, 980, 1048, 1106, 1310, 1580, 1834, 1960, 2212, 2620, 2765, 3160, 3668, 3871, 4424, 4585, 5240, 5530, 6419, 7336, 7742, 9170, 10349, 11060, 12838, 15484, 18340, 19355, 20698, 22120, 25676, 30968, 32095, 36680, 38710, 41396, 51352, 51745, 64190, 72443, 77420, 82792, 103490, 128380, 144886, 154840, 206980, 256760, 289772, 362215, 413960, 507101, 579544, 724430, 1014202, 1448860, 2028404, 2535505, 2897720, 4056808, 5071010, 10142020, 20284040]

約数ペア:

[(1, 20284040), (2, 10142020), (4, 5071010), (5, 4056808), (7, 2897720), (8, 2535505), (10, 2028404), (14, 1448860), (20, 1014202), (28, 724430), (35, 579544), (40, 507101), (49, 413960), (56, 362215), (70, 289772), (79, 256760), (98, 206980), (131, 154840), (140, 144886), (158, 128380), (196, 103490), (245, 82792), (262, 77420), (280, 72443), (316, 64190), (392, 51745), (395, 51352), (490, 41396), (524, 38710), (553, 36680), (632, 32095), (655, 30968), (790, 25676), (917, 22120), (980, 20698), (1048, 19355), (1106, 18340), (1310, 15484), (1580, 12838), (1834, 11060), (1960, 10349), (2212, 9170), (2620, 7742), (2765, 7336), (3160, 6419), (3668, 5530), (3871, 5240), (4424, 4585)]