21271890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 53498880

約数和(自身を除く): 32226990

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 31, 62, 89, 93, 155, 178, 186, 257, 267, 310, 445, 465, 514, 534, 771, 890, 930, 1285, 1335, 1542, 2570, 2670, 2759, 3855, 5518, 7710, 7967, 8277, 13795, 15934, 16554, 22873, 23901, 27590, 39835, 41385, 45746, 47802, 68619, 79670, 82770, 114365, 119505, 137238, 228730, 239010, 343095, 686190, 709063, 1418126, 2127189, 3545315, 4254378, 7090630, 10635945, 21271890]

約数ペア:

[(1, 21271890), (2, 10635945), (3, 7090630), (5, 4254378), (6, 3545315), (10, 2127189), (15, 1418126), (30, 709063), (31, 686190), (62, 343095), (89, 239010), (93, 228730), (155, 137238), (178, 119505), (186, 114365), (257, 82770), (267, 79670), (310, 68619), (445, 47802), (465, 45746), (514, 41385), (534, 39835), (771, 27590), (890, 23901), (930, 22873), (1285, 16554), (1335, 15934), (1542, 13795), (2570, 8277), (2670, 7967), (2759, 7710), (3855, 5518)]