20901720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{167}}^1$

素因数の和:337

約数の個数: 128

約数和(自身を含む): 72576000

約数和(自身を除く): 51674280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 149, 167, 168, 210, 280, 298, 334, 420, 447, 501, 596, 668, 745, 835, 840, 894, 1002, 1043, 1169, 1192, 1336, 1490, 1670, 1788, 2004, 2086, 2235, 2338, 2505, 2980, 3129, 3340, 3507, 3576, 4008, 4172, 4470, 4676, 5010, 5215, 5845, 5960, 6258, 6680, 7014, 8344, 8940, 9352, 10020, 10430, 11690, 12516, 14028, 15645, 17535, 17880, 20040, 20860, 23380, 24883, 25032, 28056, 31290, 35070, 41720, 46760, 49766, 62580, 70140, 74649, 99532, 124415, 125160, 140280, 149298, 174181, 199064, 248830, 298596, 348362, 373245, 497660, 522543, 597192, 696724, 746490, 870905, 995320, 1045086, 1393448, 1492980, 1741810, 2090172, 2612715, 2985960, 3483620, 4180344, 5225430, 6967240, 10450860, 20901720]

約数ペア:

[(1, 20901720), (2, 10450860), (3, 6967240), (4, 5225430), (5, 4180344), (6, 3483620), (7, 2985960), (8, 2612715), (10, 2090172), (12, 1741810), (14, 1492980), (15, 1393448), (20, 1045086), (21, 995320), (24, 870905), (28, 746490), (30, 696724), (35, 597192), (40, 522543), (42, 497660), (56, 373245), (60, 348362), (70, 298596), (84, 248830), (105, 199064), (120, 174181), (140, 149298), (149, 140280), (167, 125160), (168, 124415), (210, 99532), (280, 74649), (298, 70140), (334, 62580), (420, 49766), (447, 46760), (501, 41720), (596, 35070), (668, 31290), (745, 28056), (835, 25032), (840, 24883), (894, 23380), (1002, 20860), (1043, 20040), (1169, 17880), (1192, 17535), (1336, 15645), (1490, 14028), (1670, 12516), (1788, 11690), (2004, 10430), (2086, 10020), (2235, 9352), (2338, 8940), (2505, 8344), (2980, 7014), (3129, 6680), (3340, 6258), (3507, 5960), (3576, 5845), (4008, 5215), (4172, 5010), (4470, 4676)]