20673810

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^2$

素因数の和:220

約数の個数: 72

約数和(自身を含む): 56237220

約数和(自身を除く): 35563410

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 29, 30, 45, 58, 87, 89, 90, 145, 174, 178, 261, 267, 290, 435, 445, 522, 534, 801, 870, 890, 1305, 1335, 1602, 2581, 2610, 2670, 4005, 5162, 7743, 7921, 8010, 12905, 15486, 15842, 23229, 23763, 25810, 38715, 39605, 46458, 47526, 71289, 77430, 79210, 116145, 118815, 142578, 229709, 232290, 237630, 356445, 459418, 689127, 712890, 1148545, 1378254, 2067381, 2297090, 3445635, 4134762, 6891270, 10336905, 20673810]

約数ペア:

[(1, 20673810), (2, 10336905), (3, 6891270), (5, 4134762), (6, 3445635), (9, 2297090), (10, 2067381), (15, 1378254), (18, 1148545), (29, 712890), (30, 689127), (45, 459418), (58, 356445), (87, 237630), (89, 232290), (90, 229709), (145, 142578), (174, 118815), (178, 116145), (261, 79210), (267, 77430), (290, 71289), (435, 47526), (445, 46458), (522, 39605), (534, 38715), (801, 25810), (870, 23763), (890, 23229), (1305, 15842), (1335, 15486), (1602, 12905), (2581, 8010), (2610, 7921), (2670, 7743), (4005, 5162)]