20256880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{593}}^1$

素因数の和:674

約数の個数: 80

約数和(自身を含む): 54800064

約数和(自身を除く): 34543184

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 593, 610, 854, 976, 1186, 1220, 1708, 2135, 2372, 2440, 2965, 3416, 4151, 4270, 4744, 4880, 5930, 6832, 8302, 8540, 9488, 11860, 16604, 17080, 20755, 23720, 33208, 34160, 36173, 41510, 47440, 66416, 72346, 83020, 144692, 166040, 180865, 253211, 289384, 332080, 361730, 506422, 578768, 723460, 1012844, 1266055, 1446920, 2025688, 2532110, 2893840, 4051376, 5064220, 10128440, 20256880]

約数ペア:

[(1, 20256880), (2, 10128440), (4, 5064220), (5, 4051376), (7, 2893840), (8, 2532110), (10, 2025688), (14, 1446920), (16, 1266055), (20, 1012844), (28, 723460), (35, 578768), (40, 506422), (56, 361730), (61, 332080), (70, 289384), (80, 253211), (112, 180865), (122, 166040), (140, 144692), (244, 83020), (280, 72346), (305, 66416), (427, 47440), (488, 41510), (560, 36173), (593, 34160), (610, 33208), (854, 23720), (976, 20755), (1186, 17080), (1220, 16604), (1708, 11860), (2135, 9488), (2372, 8540), (2440, 8302), (2965, 6832), (3416, 5930), (4151, 4880), (4270, 4744)]