21949180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 96

約数和(自身を含む): 54432000

約数和(自身を除く): 32482820

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 59, 76, 89, 95, 110, 118, 178, 190, 209, 220, 236, 295, 356, 380, 418, 445, 590, 649, 836, 890, 979, 1045, 1121, 1180, 1298, 1691, 1780, 1958, 2090, 2242, 2596, 3245, 3382, 3916, 4180, 4484, 4895, 5251, 5605, 6490, 6764, 8455, 9790, 10502, 11210, 12331, 12980, 16910, 18601, 19580, 21004, 22420, 24662, 26255, 33820, 37202, 49324, 52510, 57761, 61655, 74404, 93005, 99769, 105020, 115522, 123310, 186010, 199538, 231044, 246620, 288805, 372020, 399076, 498845, 577610, 997690, 1097459, 1155220, 1995380, 2194918, 4389836, 5487295, 10974590, 21949180]

約数ペア:

[(1, 21949180), (2, 10974590), (4, 5487295), (5, 4389836), (10, 2194918), (11, 1995380), (19, 1155220), (20, 1097459), (22, 997690), (38, 577610), (44, 498845), (55, 399076), (59, 372020), (76, 288805), (89, 246620), (95, 231044), (110, 199538), (118, 186010), (178, 123310), (190, 115522), (209, 105020), (220, 99769), (236, 93005), (295, 74404), (356, 61655), (380, 57761), (418, 52510), (445, 49324), (590, 37202), (649, 33820), (836, 26255), (890, 24662), (979, 22420), (1045, 21004), (1121, 19580), (1180, 18601), (1298, 16910), (1691, 12980), (1780, 12331), (1958, 11210), (2090, 10502), (2242, 9790), (2596, 8455), (3245, 6764), (3382, 6490), (3916, 5605), (4180, 5251), (4484, 4895)]