19875460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 47190528

約数和(自身を除く): 27315068

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 121, 172, 191, 215, 220, 242, 382, 430, 473, 484, 605, 764, 860, 946, 955, 1210, 1892, 1910, 2101, 2365, 2420, 3820, 4202, 4730, 5203, 8213, 8404, 9460, 10406, 10505, 16426, 20812, 21010, 23111, 26015, 32852, 41065, 42020, 46222, 52030, 82130, 90343, 92444, 104060, 115555, 164260, 180686, 231110, 361372, 451715, 462220, 903430, 993773, 1806860, 1987546, 3975092, 4968865, 9937730, 19875460]

約数ペア:

[(1, 19875460), (2, 9937730), (4, 4968865), (5, 3975092), (10, 1987546), (11, 1806860), (20, 993773), (22, 903430), (43, 462220), (44, 451715), (55, 361372), (86, 231110), (110, 180686), (121, 164260), (172, 115555), (191, 104060), (215, 92444), (220, 90343), (242, 82130), (382, 52030), (430, 46222), (473, 42020), (484, 41065), (605, 32852), (764, 26015), (860, 23111), (946, 21010), (955, 20812), (1210, 16426), (1892, 10505), (1910, 10406), (2101, 9460), (2365, 8404), (2420, 8213), (3820, 5203), (4202, 4730)]