21063720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{683}}^1$

素因数の和:954

約数の個数: 64

約数和(自身を含む): 63529920

約数和(自身を除く): 42466200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 257, 514, 683, 771, 1028, 1285, 1366, 1542, 2049, 2056, 2570, 2732, 3084, 3415, 3855, 4098, 5140, 5464, 6168, 6830, 7710, 8196, 10245, 10280, 13660, 15420, 16392, 20490, 27320, 30840, 40980, 81960, 175531, 351062, 526593, 702124, 877655, 1053186, 1404248, 1755310, 2106372, 2632965, 3510620, 4212744, 5265930, 7021240, 10531860, 21063720]

約数ペア:

[(1, 21063720), (2, 10531860), (3, 7021240), (4, 5265930), (5, 4212744), (6, 3510620), (8, 2632965), (10, 2106372), (12, 1755310), (15, 1404248), (20, 1053186), (24, 877655), (30, 702124), (40, 526593), (60, 351062), (120, 175531), (257, 81960), (514, 40980), (683, 30840), (771, 27320), (1028, 20490), (1285, 16392), (1366, 15420), (1542, 13660), (2049, 10280), (2056, 10245), (2570, 8196), (2732, 7710), (3084, 6830), (3415, 6168), (3855, 5464), (4098, 5140)]