21643520

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{457}}^1$

素因数の和:515

約数の個数: 72

約数和(自身を含む): 53360664

約数和(自身を除く): 31717144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 457, 592, 640, 740, 914, 1184, 1280, 1480, 1828, 2285, 2368, 2960, 3656, 4570, 4736, 5920, 7312, 9140, 9472, 11840, 14624, 16909, 18280, 23680, 29248, 33818, 36560, 47360, 58496, 67636, 73120, 84545, 116992, 135272, 146240, 169090, 270544, 292480, 338180, 541088, 584960, 676360, 1082176, 1352720, 2164352, 2705440, 4328704, 5410880, 10821760, 21643520]

約数ペア:

[(1, 21643520), (2, 10821760), (4, 5410880), (5, 4328704), (8, 2705440), (10, 2164352), (16, 1352720), (20, 1082176), (32, 676360), (37, 584960), (40, 541088), (64, 338180), (74, 292480), (80, 270544), (128, 169090), (148, 146240), (160, 135272), (185, 116992), (256, 84545), (296, 73120), (320, 67636), (370, 58496), (457, 47360), (592, 36560), (640, 33818), (740, 29248), (914, 23680), (1184, 18280), (1280, 16909), (1480, 14624), (1828, 11840), (2285, 9472), (2368, 9140), (2960, 7312), (3656, 5920), (4570, 4736)]