21545000

素因数分解:

$2^3\times 5^4\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:196

約数の個数: 80

約数和(自身を含む): 52483200

約数和(自身を除く): 30938200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 139, 155, 200, 248, 250, 278, 310, 500, 556, 620, 625, 695, 775, 1000, 1112, 1240, 1250, 1390, 1550, 2500, 2780, 3100, 3475, 3875, 4309, 5000, 5560, 6200, 6950, 7750, 8618, 13900, 15500, 17236, 17375, 19375, 21545, 27800, 31000, 34472, 34750, 38750, 43090, 69500, 77500, 86180, 86875, 107725, 139000, 155000, 172360, 173750, 215450, 347500, 430900, 538625, 695000, 861800, 1077250, 2154500, 2693125, 4309000, 5386250, 10772500, 21545000]

約数ペア:

[(1, 21545000), (2, 10772500), (4, 5386250), (5, 4309000), (8, 2693125), (10, 2154500), (20, 1077250), (25, 861800), (31, 695000), (40, 538625), (50, 430900), (62, 347500), (100, 215450), (124, 173750), (125, 172360), (139, 155000), (155, 139000), (200, 107725), (248, 86875), (250, 86180), (278, 77500), (310, 69500), (500, 43090), (556, 38750), (620, 34750), (625, 34472), (695, 31000), (775, 27800), (1000, 21545), (1112, 19375), (1240, 17375), (1250, 17236), (1390, 15500), (1550, 13900), (2500, 8618), (2780, 7750), (3100, 6950), (3475, 6200), (3875, 5560), (4309, 5000)]