19647920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{14447}}^1$

素因数の和:14477

約数の個数: 40

約数和(自身を含む): 48371904

約数和(自身を除く): 28723984

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 14447, 28894, 57788, 72235, 115576, 144470, 231152, 245599, 288940, 491198, 577880, 982396, 1155760, 1227995, 1964792, 2455990, 3929584, 4911980, 9823960, 19647920]

約数ペア:

[(1, 19647920), (2, 9823960), (4, 4911980), (5, 3929584), (8, 2455990), (10, 1964792), (16, 1227995), (17, 1155760), (20, 982396), (34, 577880), (40, 491198), (68, 288940), (80, 245599), (85, 231152), (136, 144470), (170, 115576), (272, 72235), (340, 57788), (680, 28894), (1360, 14447)]