21690880

素因数分解:

$2^9\times 5^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:289

約数の個数: 80

約数和(自身を含む): 53646120

約数和(自身を除く): 31955240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 229, 256, 296, 320, 370, 458, 512, 592, 640, 740, 916, 1145, 1184, 1280, 1480, 1832, 2290, 2368, 2560, 2960, 3664, 4580, 4736, 5920, 7328, 8473, 9160, 9472, 11840, 14656, 16946, 18320, 18944, 23680, 29312, 33892, 36640, 42365, 47360, 58624, 67784, 73280, 84730, 94720, 117248, 135568, 146560, 169460, 271136, 293120, 338920, 542272, 586240, 677840, 1084544, 1355680, 2169088, 2711360, 4338176, 5422720, 10845440, 21690880]

約数ペア:

[(1, 21690880), (2, 10845440), (4, 5422720), (5, 4338176), (8, 2711360), (10, 2169088), (16, 1355680), (20, 1084544), (32, 677840), (37, 586240), (40, 542272), (64, 338920), (74, 293120), (80, 271136), (128, 169460), (148, 146560), (160, 135568), (185, 117248), (229, 94720), (256, 84730), (296, 73280), (320, 67784), (370, 58624), (458, 47360), (512, 42365), (592, 36640), (640, 33892), (740, 29312), (916, 23680), (1145, 18944), (1184, 18320), (1280, 16946), (1480, 14656), (1832, 11840), (2290, 9472), (2368, 9160), (2560, 8473), (2960, 7328), (3664, 5920), (4580, 4736)]