21601900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 50528016

約数和(自身を除く): 28926116

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 97, 100, 131, 170, 194, 262, 340, 388, 425, 485, 524, 655, 850, 970, 1310, 1649, 1700, 1940, 2227, 2425, 2620, 3275, 3298, 4454, 4850, 6550, 6596, 8245, 8908, 9700, 11135, 12707, 13100, 16490, 22270, 25414, 32980, 41225, 44540, 50828, 55675, 63535, 82450, 111350, 127070, 164900, 216019, 222700, 254140, 317675, 432038, 635350, 864076, 1080095, 1270700, 2160190, 4320380, 5400475, 10800950, 21601900]

約数ペア:

[(1, 21601900), (2, 10800950), (4, 5400475), (5, 4320380), (10, 2160190), (17, 1270700), (20, 1080095), (25, 864076), (34, 635350), (50, 432038), (68, 317675), (85, 254140), (97, 222700), (100, 216019), (131, 164900), (170, 127070), (194, 111350), (262, 82450), (340, 63535), (388, 55675), (425, 50828), (485, 44540), (524, 41225), (655, 32980), (850, 25414), (970, 22270), (1310, 16490), (1649, 13100), (1700, 12707), (1940, 11135), (2227, 9700), (2425, 8908), (2620, 8245), (3275, 6596), (3298, 6550), (4454, 4850)]