21253960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5839}}^1$

素因数の和:5870

約数の個数: 64

約数和(自身を含む): 58867200

約数和(自身を除く): 37613240

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5839, 11678, 23356, 29195, 40873, 46712, 58390, 75907, 81746, 116780, 151814, 163492, 204365, 233560, 303628, 326984, 379535, 408730, 531349, 607256, 759070, 817460, 1062698, 1518140, 1634920, 2125396, 2656745, 3036280, 4250792, 5313490, 10626980, 21253960]

約数ペア:

[(1, 21253960), (2, 10626980), (4, 5313490), (5, 4250792), (7, 3036280), (8, 2656745), (10, 2125396), (13, 1634920), (14, 1518140), (20, 1062698), (26, 817460), (28, 759070), (35, 607256), (40, 531349), (52, 408730), (56, 379535), (65, 326984), (70, 303628), (91, 233560), (104, 204365), (130, 163492), (140, 151814), (182, 116780), (260, 81746), (280, 75907), (364, 58390), (455, 46712), (520, 40873), (728, 29195), (910, 23356), (1820, 11678), (3640, 5839)]