21268750

素因数分解:

$2^1\times 5^5\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:151

約数の個数: 48

約数和(自身を含む): 41341104

約数和(自身を除く): 20072354

約数列:

[1, 2, 5, 10, 25, 41, 50, 82, 83, 125, 166, 205, 250, 410, 415, 625, 830, 1025, 1250, 2050, 2075, 3125, 3403, 4150, 5125, 6250, 6806, 10250, 10375, 17015, 20750, 25625, 34030, 51250, 51875, 85075, 103750, 128125, 170150, 256250, 259375, 425375, 518750, 850750, 2126875, 4253750, 10634375, 21268750]

約数ペア:

[(1, 21268750), (2, 10634375), (5, 4253750), (10, 2126875), (25, 850750), (41, 518750), (50, 425375), (82, 259375), (83, 256250), (125, 170150), (166, 128125), (205, 103750), (250, 85075), (410, 51875), (415, 51250), (625, 34030), (830, 25625), (1025, 20750), (1250, 17015), (2050, 10375), (2075, 10250), (3125, 6806), (3403, 6250), (4150, 5125)]