19513540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{449}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 42865200

約数和(自身を除く): 23351660

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 106, 164, 205, 212, 265, 410, 449, 530, 820, 898, 1060, 1796, 2173, 2245, 4346, 4490, 8692, 8980, 10865, 18409, 21730, 23797, 36818, 43460, 47594, 73636, 92045, 95188, 118985, 184090, 237970, 368180, 475940, 975677, 1951354, 3902708, 4878385, 9756770, 19513540]

約数ペア:

[(1, 19513540), (2, 9756770), (4, 4878385), (5, 3902708), (10, 1951354), (20, 975677), (41, 475940), (53, 368180), (82, 237970), (106, 184090), (164, 118985), (205, 95188), (212, 92045), (265, 73636), (410, 47594), (449, 43460), (530, 36818), (820, 23797), (898, 21730), (1060, 18409), (1796, 10865), (2173, 8980), (2245, 8692), (4346, 4490)]