20606720

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{947}}^1$

素因数の和:985

約数の個数: 72

約数和(自身を含む): 52318224

約数和(自身を除く): 31711504

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, 947, 1088, 1280, 1360, 1894, 2176, 2720, 3788, 4352, 4735, 5440, 7576, 9470, 10880, 15152, 16099, 18940, 21760, 30304, 32198, 37880, 60608, 64396, 75760, 80495, 121216, 128792, 151520, 160990, 242432, 257584, 303040, 321980, 515168, 606080, 643960, 1030336, 1212160, 1287920, 2060672, 2575840, 4121344, 5151680, 10303360, 20606720]

約数ペア:

[(1, 20606720), (2, 10303360), (4, 5151680), (5, 4121344), (8, 2575840), (10, 2060672), (16, 1287920), (17, 1212160), (20, 1030336), (32, 643960), (34, 606080), (40, 515168), (64, 321980), (68, 303040), (80, 257584), (85, 242432), (128, 160990), (136, 151520), (160, 128792), (170, 121216), (256, 80495), (272, 75760), (320, 64396), (340, 60608), (544, 37880), (640, 32198), (680, 30304), (947, 21760), (1088, 18940), (1280, 16099), (1360, 15152), (1894, 10880), (2176, 9470), (2720, 7576), (3788, 5440), (4352, 4735)]