21000427960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{413069}}^1$

素因数の和:413152

約数の個数: 64

約数和(自身を含む): 49964947200

約数和(自身を除く): 28964519240

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 410, 620, 820, 1240, 1271, 1640, 2542, 5084, 6355, 10168, 12710, 25420, 50840, 413069, 826138, 1652276, 2065345, 3304552, 4130690, 8261380, 12805139, 16522760, 16935829, 25610278, 33871658, 51220556, 64025695, 67743316, 84679145, 102441112, 128051390, 135486632, 169358290, 256102780, 338716580, 512205560, 525010699, 677433160, 1050021398, 2100042796, 2625053495, 4200085592, 5250106990, 10500213980, 21000427960]

約数ペア:

[(1, 21000427960), (2, 10500213980), (4, 5250106990), (5, 4200085592), (8, 2625053495), (10, 2100042796), (20, 1050021398), (31, 677433160), (40, 525010699), (41, 512205560), (62, 338716580), (82, 256102780), (124, 169358290), (155, 135486632), (164, 128051390), (205, 102441112), (248, 84679145), (310, 67743316), (328, 64025695), (410, 51220556), (620, 33871658), (820, 25610278), (1240, 16935829), (1271, 16522760), (1640, 12805139), (2542, 8261380), (5084, 4130690), (6355, 3304552), (10168, 2065345), (12710, 1652276), (25420, 826138), (50840, 413069)]