18321920

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{421}}^1$

素因数の和:461

約数の個数: 80

約数和(自身を含む): 46624248

約数和(自身を除く): 28302328

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 421, 512, 544, 640, 680, 842, 1088, 1280, 1360, 1684, 2105, 2176, 2560, 2720, 3368, 4210, 4352, 5440, 6736, 7157, 8420, 8704, 10880, 13472, 14314, 16840, 21760, 26944, 28628, 33680, 35785, 43520, 53888, 57256, 67360, 71570, 107776, 114512, 134720, 143140, 215552, 229024, 269440, 286280, 458048, 538880, 572560, 916096, 1077760, 1145120, 1832192, 2290240, 3664384, 4580480, 9160960, 18321920]

約数ペア:

[(1, 18321920), (2, 9160960), (4, 4580480), (5, 3664384), (8, 2290240), (10, 1832192), (16, 1145120), (17, 1077760), (20, 916096), (32, 572560), (34, 538880), (40, 458048), (64, 286280), (68, 269440), (80, 229024), (85, 215552), (128, 143140), (136, 134720), (160, 114512), (170, 107776), (256, 71570), (272, 67360), (320, 57256), (340, 53888), (421, 43520), (512, 35785), (544, 33680), (640, 28628), (680, 26944), (842, 21760), (1088, 16840), (1280, 14314), (1360, 13472), (1684, 10880), (2105, 8704), (2176, 8420), (2560, 7157), (2720, 6736), (3368, 5440), (4210, 4352)]