221521000

素因数分解:

$2^3\times 5^3\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:260

約数の個数: 128

約数和(自身を含む): 555984000

約数和(自身を除く): 334463000

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 89, 95, 100, 125, 131, 152, 178, 190, 200, 250, 262, 356, 380, 445, 475, 500, 524, 655, 712, 760, 890, 950, 1000, 1048, 1310, 1691, 1780, 1900, 2225, 2375, 2489, 2620, 3275, 3382, 3560, 3800, 4450, 4750, 4978, 5240, 6550, 6764, 8455, 8900, 9500, 9956, 11125, 11659, 12445, 13100, 13528, 16375, 16910, 17800, 19000, 19912, 22250, 23318, 24890, 26200, 32750, 33820, 42275, 44500, 46636, 49780, 58295, 62225, 65500, 67640, 84550, 89000, 93272, 99560, 116590, 124450, 131000, 169100, 211375, 221521, 233180, 248900, 291475, 311125, 338200, 422750, 443042, 466360, 497800, 582950, 622250, 845500, 886084, 1107605, 1165900, 1244500, 1457375, 1691000, 1772168, 2215210, 2331800, 2489000, 2914750, 4430420, 5538025, 5829500, 8860840, 11076050, 11659000, 22152100, 27690125, 44304200, 55380250, 110760500, 221521000]

約数ペア:

[(1, 221521000), (2, 110760500), (4, 55380250), (5, 44304200), (8, 27690125), (10, 22152100), (19, 11659000), (20, 11076050), (25, 8860840), (38, 5829500), (40, 5538025), (50, 4430420), (76, 2914750), (89, 2489000), (95, 2331800), (100, 2215210), (125, 1772168), (131, 1691000), (152, 1457375), (178, 1244500), (190, 1165900), (200, 1107605), (250, 886084), (262, 845500), (356, 622250), (380, 582950), (445, 497800), (475, 466360), (500, 443042), (524, 422750), (655, 338200), (712, 311125), (760, 291475), (890, 248900), (950, 233180), (1000, 221521), (1048, 211375), (1310, 169100), (1691, 131000), (1780, 124450), (1900, 116590), (2225, 99560), (2375, 93272), (2489, 89000), (2620, 84550), (3275, 67640), (3382, 65500), (3560, 62225), (3800, 58295), (4450, 49780), (4750, 46636), (4978, 44500), (5240, 42275), (6550, 33820), (6764, 32750), (8455, 26200), (8900, 24890), (9500, 23318), (9956, 22250), (11125, 19912), (11659, 19000), (12445, 17800), (13100, 16910), (13528, 16375)]