20463920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{367}}^1$

素因数の和:438

約数の個数: 80

約数和(自身を含む): 51746688

約数和(自身を除く): 31282768

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 41, 68, 80, 82, 85, 136, 164, 170, 205, 272, 328, 340, 367, 410, 656, 680, 697, 734, 820, 1360, 1394, 1468, 1640, 1835, 2788, 2936, 3280, 3485, 3670, 5576, 5872, 6239, 6970, 7340, 11152, 12478, 13940, 14680, 15047, 24956, 27880, 29360, 30094, 31195, 49912, 55760, 60188, 62390, 75235, 99824, 120376, 124780, 150470, 240752, 249560, 255799, 300940, 499120, 511598, 601880, 1023196, 1203760, 1278995, 2046392, 2557990, 4092784, 5115980, 10231960, 20463920]

約数ペア:

[(1, 20463920), (2, 10231960), (4, 5115980), (5, 4092784), (8, 2557990), (10, 2046392), (16, 1278995), (17, 1203760), (20, 1023196), (34, 601880), (40, 511598), (41, 499120), (68, 300940), (80, 255799), (82, 249560), (85, 240752), (136, 150470), (164, 124780), (170, 120376), (205, 99824), (272, 75235), (328, 62390), (340, 60188), (367, 55760), (410, 49912), (656, 31195), (680, 30094), (697, 29360), (734, 27880), (820, 24956), (1360, 15047), (1394, 14680), (1468, 13940), (1640, 12478), (1835, 11152), (2788, 7340), (2936, 6970), (3280, 6239), (3485, 5872), (3670, 5576)]