19701220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1163}}^1$

素因数の和:1201

約数の個数: 72

約数和(自身を含む): 52016832

約数和(自身を除く): 32315612

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1163, 1210, 1540, 1694, 2326, 2420, 3388, 4235, 4652, 5815, 8141, 8470, 11630, 12793, 16282, 16940, 23260, 25586, 32564, 40705, 51172, 63965, 81410, 89551, 127930, 140723, 162820, 179102, 255860, 281446, 358204, 447755, 562892, 703615, 895510, 985061, 1407230, 1791020, 1970122, 2814460, 3940244, 4925305, 9850610, 19701220]

約数ペア:

[(1, 19701220), (2, 9850610), (4, 4925305), (5, 3940244), (7, 2814460), (10, 1970122), (11, 1791020), (14, 1407230), (20, 985061), (22, 895510), (28, 703615), (35, 562892), (44, 447755), (55, 358204), (70, 281446), (77, 255860), (110, 179102), (121, 162820), (140, 140723), (154, 127930), (220, 89551), (242, 81410), (308, 63965), (385, 51172), (484, 40705), (605, 32564), (770, 25586), (847, 23260), (1163, 16940), (1210, 16282), (1540, 12793), (1694, 11630), (2326, 8470), (2420, 8141), (3388, 5815), (4235, 4652)]