180500000

素因数分解:

$2^5\times 5^6\times {\mathrm{19}}^2$

素因数の和:78

約数の個数: 126

約数和(自身を含む): 468802593

約数和(自身を除く): 288302593

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 76, 80, 95, 100, 125, 152, 160, 190, 200, 250, 304, 361, 380, 400, 475, 500, 608, 625, 722, 760, 800, 950, 1000, 1250, 1444, 1520, 1805, 1900, 2000, 2375, 2500, 2888, 3040, 3125, 3610, 3800, 4000, 4750, 5000, 5776, 6250, 7220, 7600, 9025, 9500, 10000, 11552, 11875, 12500, 14440, 15200, 15625, 18050, 19000, 20000, 23750, 25000, 28880, 31250, 36100, 38000, 45125, 47500, 50000, 57760, 59375, 62500, 72200, 76000, 90250, 95000, 100000, 118750, 125000, 144400, 180500, 190000, 225625, 237500, 250000, 288800, 296875, 361000, 380000, 451250, 475000, 500000, 593750, 722000, 902500, 950000, 1128125, 1187500, 1444000, 1805000, 1900000, 2256250, 2375000, 3610000, 4512500, 4750000, 5640625, 7220000, 9025000, 9500000, 11281250, 18050000, 22562500, 36100000, 45125000, 90250000, 180500000]

約数ペア:

[(1, 180500000), (2, 90250000), (4, 45125000), (5, 36100000), (8, 22562500), (10, 18050000), (16, 11281250), (19, 9500000), (20, 9025000), (25, 7220000), (32, 5640625), (38, 4750000), (40, 4512500), (50, 3610000), (76, 2375000), (80, 2256250), (95, 1900000), (100, 1805000), (125, 1444000), (152, 1187500), (160, 1128125), (190, 950000), (200, 902500), (250, 722000), (304, 593750), (361, 500000), (380, 475000), (400, 451250), (475, 380000), (500, 361000), (608, 296875), (625, 288800), (722, 250000), (760, 237500), (800, 225625), (950, 190000), (1000, 180500), (1250, 144400), (1444, 125000), (1520, 118750), (1805, 100000), (1900, 95000), (2000, 90250), (2375, 76000), (2500, 72200), (2888, 62500), (3040, 59375), (3125, 57760), (3610, 50000), (3800, 47500), (4000, 45125), (4750, 38000), (5000, 36100), (5776, 31250), (6250, 28880), (7220, 25000), (7600, 23750), (9025, 20000), (9500, 19000), (10000, 18050), (11552, 15625), (11875, 15200), (12500, 14440)]