18780051875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{74561}}^1$

素因数の和:74625

約数の個数: 40

約数和(自身を含む): 26088349056

約数和(自身を除く): 7308297181

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 325, 403, 625, 775, 1625, 2015, 3875, 8125, 10075, 19375, 50375, 74561, 251875, 372805, 969293, 1864025, 2311391, 4846465, 9320125, 11556955, 24232325, 30048083, 46600625, 57784775, 121161625, 150240415, 288923875, 605808125, 751202075, 1444619375, 3756010375, 18780051875]

約数ペア:

[(1, 18780051875), (5, 3756010375), (13, 1444619375), (25, 751202075), (31, 605808125), (65, 288923875), (125, 150240415), (155, 121161625), (325, 57784775), (403, 46600625), (625, 30048083), (775, 24232325), (1625, 11556955), (2015, 9320125), (3875, 4846465), (8125, 2311391), (10075, 1864025), (19375, 969293), (50375, 372805), (74561, 251875)]