399927040

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{18379}}^1$

素因数の和:18417

約数の個数: 72

約数和(自身を含む): 1014355440

約数和(自身を除く): 614428400

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, 1088, 1280, 1360, 2176, 2720, 4352, 5440, 10880, 18379, 21760, 36758, 73516, 91895, 147032, 183790, 294064, 312443, 367580, 588128, 624886, 735160, 1176256, 1249772, 1470320, 1562215, 2352512, 2499544, 2940640, 3124430, 4705024, 4999088, 5881280, 6248860, 9998176, 11762560, 12497720, 19996352, 23525120, 24995440, 39992704, 49990880, 79985408, 99981760, 199963520, 399927040]

約数ペア:

[(1, 399927040), (2, 199963520), (4, 99981760), (5, 79985408), (8, 49990880), (10, 39992704), (16, 24995440), (17, 23525120), (20, 19996352), (32, 12497720), (34, 11762560), (40, 9998176), (64, 6248860), (68, 5881280), (80, 4999088), (85, 4705024), (128, 3124430), (136, 2940640), (160, 2499544), (170, 2352512), (256, 1562215), (272, 1470320), (320, 1249772), (340, 1176256), (544, 735160), (640, 624886), (680, 588128), (1088, 367580), (1280, 312443), (1360, 294064), (2176, 183790), (2720, 147032), (4352, 91895), (5440, 73516), (10880, 36758), (18379, 21760)]