21308700

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:236

約数の個数: 144

約数和(自身を含む): 71939840

約数和(自身を除く): 50631140

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 50, 60, 70, 73, 75, 84, 100, 105, 139, 140, 146, 150, 175, 210, 219, 278, 292, 300, 350, 365, 417, 420, 438, 511, 525, 556, 695, 700, 730, 834, 876, 973, 1022, 1050, 1095, 1390, 1460, 1533, 1668, 1825, 1946, 2044, 2085, 2100, 2190, 2555, 2780, 2919, 3066, 3475, 3650, 3892, 4170, 4380, 4865, 5110, 5475, 5838, 6132, 6950, 7300, 7665, 8340, 9730, 10147, 10220, 10425, 10950, 11676, 12775, 13900, 14595, 15330, 19460, 20294, 20850, 21900, 24325, 25550, 29190, 30441, 30660, 38325, 40588, 41700, 48650, 50735, 51100, 58380, 60882, 71029, 72975, 76650, 97300, 101470, 121764, 142058, 145950, 152205, 153300, 202940, 213087, 253675, 284116, 291900, 304410, 355145, 426174, 507350, 608820, 710290, 761025, 852348, 1014700, 1065435, 1420580, 1522050, 1775725, 2130870, 3044100, 3551450, 4261740, 5327175, 7102900, 10654350, 21308700]

約数ペア:

[(1, 21308700), (2, 10654350), (3, 7102900), (4, 5327175), (5, 4261740), (6, 3551450), (7, 3044100), (10, 2130870), (12, 1775725), (14, 1522050), (15, 1420580), (20, 1065435), (21, 1014700), (25, 852348), (28, 761025), (30, 710290), (35, 608820), (42, 507350), (50, 426174), (60, 355145), (70, 304410), (73, 291900), (75, 284116), (84, 253675), (100, 213087), (105, 202940), (139, 153300), (140, 152205), (146, 145950), (150, 142058), (175, 121764), (210, 101470), (219, 97300), (278, 76650), (292, 72975), (300, 71029), (350, 60882), (365, 58380), (417, 51100), (420, 50735), (438, 48650), (511, 41700), (525, 40588), (556, 38325), (695, 30660), (700, 30441), (730, 29190), (834, 25550), (876, 24325), (973, 21900), (1022, 20850), (1050, 20294), (1095, 19460), (1390, 15330), (1460, 14595), (1533, 13900), (1668, 12775), (1825, 11676), (1946, 10950), (2044, 10425), (2085, 10220), (2100, 10147), (2190, 9730), (2555, 8340), (2780, 7665), (2919, 7300), (3066, 6950), (3475, 6132), (3650, 5838), (3892, 5475), (4170, 5110), (4380, 4865)]