21701420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:255

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 32488660

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 23, 26, 38, 46, 52, 65, 76, 92, 95, 115, 130, 190, 191, 230, 247, 260, 299, 380, 382, 437, 460, 494, 598, 764, 874, 955, 988, 1196, 1235, 1495, 1748, 1910, 2185, 2470, 2483, 2990, 3629, 3820, 4370, 4393, 4940, 4966, 5681, 5980, 7258, 8740, 8786, 9932, 11362, 12415, 14516, 17572, 18145, 21965, 22724, 24830, 28405, 36290, 43930, 47177, 49660, 56810, 57109, 72580, 83467, 87860, 94354, 113620, 114218, 166934, 188708, 228436, 235885, 285545, 333868, 417335, 471770, 571090, 834670, 943540, 1085071, 1142180, 1669340, 2170142, 4340284, 5425355, 10850710, 21701420]

約数ペア:

[(1, 21701420), (2, 10850710), (4, 5425355), (5, 4340284), (10, 2170142), (13, 1669340), (19, 1142180), (20, 1085071), (23, 943540), (26, 834670), (38, 571090), (46, 471770), (52, 417335), (65, 333868), (76, 285545), (92, 235885), (95, 228436), (115, 188708), (130, 166934), (190, 114218), (191, 113620), (230, 94354), (247, 87860), (260, 83467), (299, 72580), (380, 57109), (382, 56810), (437, 49660), (460, 47177), (494, 43930), (598, 36290), (764, 28405), (874, 24830), (955, 22724), (988, 21965), (1196, 18145), (1235, 17572), (1495, 14516), (1748, 12415), (1910, 11362), (2185, 9932), (2470, 8786), (2483, 8740), (2990, 7258), (3629, 5980), (3820, 5681), (4370, 4966), (4393, 4940)]