21002480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15443}}^1$

素因数の和:15473

約数の個数: 40

約数和(自身を含む): 51706512

約数和(自身を除く): 30704032

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15443, 30886, 61772, 77215, 123544, 154430, 247088, 262531, 308860, 525062, 617720, 1050124, 1235440, 1312655, 2100248, 2625310, 4200496, 5250620, 10501240, 21002480]

約数ペア:

[(1, 21002480), (2, 10501240), (4, 5250620), (5, 4200496), (8, 2625310), (10, 2100248), (16, 1312655), (17, 1235440), (20, 1050124), (34, 617720), (40, 525062), (68, 308860), (80, 262531), (85, 247088), (136, 154430), (170, 123544), (272, 77215), (340, 61772), (680, 30886), (1360, 15443)]