210721840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{571}}^1\times {\mathrm{659}}^1$

素因数の和:1250

約数の個数: 80

約数和(自身を含む): 561749760

約数和(自身を除く): 351027920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 571, 659, 1142, 1318, 2284, 2636, 2855, 3295, 3997, 4568, 4613, 5272, 5710, 6590, 7994, 9136, 9226, 10544, 11420, 13180, 15988, 18452, 19985, 22840, 23065, 26360, 31976, 36904, 39970, 45680, 46130, 52720, 63952, 73808, 79940, 92260, 159880, 184520, 319760, 369040, 376289, 752578, 1505156, 1881445, 2634023, 3010312, 3762890, 5268046, 6020624, 7525780, 10536092, 13170115, 15051560, 21072184, 26340230, 30103120, 42144368, 52680460, 105360920, 210721840]

約数ペア:

[(1, 210721840), (2, 105360920), (4, 52680460), (5, 42144368), (7, 30103120), (8, 26340230), (10, 21072184), (14, 15051560), (16, 13170115), (20, 10536092), (28, 7525780), (35, 6020624), (40, 5268046), (56, 3762890), (70, 3010312), (80, 2634023), (112, 1881445), (140, 1505156), (280, 752578), (560, 376289), (571, 369040), (659, 319760), (1142, 184520), (1318, 159880), (2284, 92260), (2636, 79940), (2855, 73808), (3295, 63952), (3997, 52720), (4568, 46130), (4613, 45680), (5272, 39970), (5710, 36904), (6590, 31976), (7994, 26360), (9136, 23065), (9226, 22840), (10544, 19985), (11420, 18452), (13180, 15988)]