20737280

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{953}}^1$

素因数の和:991

約数の個数: 72

約数和(自身を含む): 52649352

約数和(自身を除く): 31912072

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, 544, 640, 680, 953, 1088, 1280, 1360, 1906, 2176, 2720, 3812, 4352, 4765, 5440, 7624, 9530, 10880, 15248, 16201, 19060, 21760, 30496, 32402, 38120, 60992, 64804, 76240, 81005, 121984, 129608, 152480, 162010, 243968, 259216, 304960, 324020, 518432, 609920, 648040, 1036864, 1219840, 1296080, 2073728, 2592160, 4147456, 5184320, 10368640, 20737280]

約数ペア:

[(1, 20737280), (2, 10368640), (4, 5184320), (5, 4147456), (8, 2592160), (10, 2073728), (16, 1296080), (17, 1219840), (20, 1036864), (32, 648040), (34, 609920), (40, 518432), (64, 324020), (68, 304960), (80, 259216), (85, 243968), (128, 162010), (136, 152480), (160, 129608), (170, 121984), (256, 81005), (272, 76240), (320, 64804), (340, 60992), (544, 38120), (640, 32402), (680, 30496), (953, 21760), (1088, 19060), (1280, 16201), (1360, 15248), (1906, 10880), (2176, 9530), (2720, 7624), (3812, 5440), (4352, 4765)]