21531250

素因数分解:

$2^1\times 5^6\times {\mathrm{13}}^1\times {\mathrm{53}}^1$

素因数の和:98

約数の個数: 56

約数和(自身を含む): 44296308

約数和(自身を除く): 22765058

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 53, 65, 106, 125, 130, 250, 265, 325, 530, 625, 650, 689, 1250, 1325, 1378, 1625, 2650, 3125, 3250, 3445, 6250, 6625, 6890, 8125, 13250, 15625, 16250, 17225, 31250, 33125, 34450, 40625, 66250, 81250, 86125, 165625, 172250, 203125, 331250, 406250, 430625, 828125, 861250, 1656250, 2153125, 4306250, 10765625, 21531250]

約数ペア:

[(1, 21531250), (2, 10765625), (5, 4306250), (10, 2153125), (13, 1656250), (25, 861250), (26, 828125), (50, 430625), (53, 406250), (65, 331250), (106, 203125), (125, 172250), (130, 165625), (250, 86125), (265, 81250), (325, 66250), (530, 40625), (625, 34450), (650, 33125), (689, 31250), (1250, 17225), (1325, 16250), (1378, 15625), (1625, 13250), (2650, 8125), (3125, 6890), (3250, 6625), (3445, 6250)]