20923940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 29879260

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 41, 68, 76, 79, 82, 85, 95, 158, 164, 170, 190, 205, 316, 323, 340, 380, 395, 410, 646, 697, 779, 790, 820, 1292, 1343, 1394, 1501, 1558, 1580, 1615, 2686, 2788, 3002, 3116, 3230, 3239, 3485, 3895, 5372, 6004, 6460, 6478, 6715, 6970, 7505, 7790, 12956, 13243, 13430, 13940, 15010, 15580, 16195, 25517, 26486, 26860, 30020, 32390, 51034, 52972, 55063, 61541, 64780, 66215, 102068, 110126, 123082, 127585, 132430, 220252, 246164, 255170, 264860, 275315, 307705, 510340, 550630, 615410, 1046197, 1101260, 1230820, 2092394, 4184788, 5230985, 10461970, 20923940]

約数ペア:

[(1, 20923940), (2, 10461970), (4, 5230985), (5, 4184788), (10, 2092394), (17, 1230820), (19, 1101260), (20, 1046197), (34, 615410), (38, 550630), (41, 510340), (68, 307705), (76, 275315), (79, 264860), (82, 255170), (85, 246164), (95, 220252), (158, 132430), (164, 127585), (170, 123082), (190, 110126), (205, 102068), (316, 66215), (323, 64780), (340, 61541), (380, 55063), (395, 52972), (410, 51034), (646, 32390), (697, 30020), (779, 26860), (790, 26486), (820, 25517), (1292, 16195), (1343, 15580), (1394, 15010), (1501, 13940), (1558, 13430), (1580, 13243), (1615, 12956), (2686, 7790), (2788, 7505), (3002, 6970), (3116, 6715), (3230, 6478), (3239, 6460), (3485, 6004), (3895, 5372)]