21572590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 44416512

約数和(自身を除く): 22843922

約数列:

[1, 2, 5, 10, 13, 26, 31, 53, 62, 65, 101, 106, 130, 155, 202, 265, 310, 403, 505, 530, 689, 806, 1010, 1313, 1378, 1643, 2015, 2626, 3131, 3286, 3445, 4030, 5353, 6262, 6565, 6890, 8215, 10706, 13130, 15655, 16430, 21359, 26765, 31310, 40703, 42718, 53530, 69589, 81406, 106795, 139178, 165943, 203515, 213590, 331886, 347945, 407030, 695890, 829715, 1659430, 2157259, 4314518, 10786295, 21572590]

約数ペア:

[(1, 21572590), (2, 10786295), (5, 4314518), (10, 2157259), (13, 1659430), (26, 829715), (31, 695890), (53, 407030), (62, 347945), (65, 331886), (101, 213590), (106, 203515), (130, 165943), (155, 139178), (202, 106795), (265, 81406), (310, 69589), (403, 53530), (505, 42718), (530, 40703), (689, 31310), (806, 26765), (1010, 21359), (1313, 16430), (1378, 15655), (1643, 13130), (2015, 10706), (2626, 8215), (3131, 6890), (3286, 6565), (3445, 6262), (4030, 5353)]