21609555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 19102125

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 61, 95, 113, 165, 183, 209, 285, 305, 339, 565, 627, 671, 915, 1045, 1159, 1243, 1695, 2013, 2147, 3135, 3355, 3477, 3729, 5795, 6215, 6441, 6893, 10065, 10735, 12749, 17385, 18645, 20679, 23617, 32205, 34465, 38247, 63745, 70851, 75823, 103395, 118085, 130967, 191235, 227469, 354255, 379115, 392901, 654835, 1137345, 1440637, 1964505, 4321911, 7203185, 21609555]

約数ペア:

[(1, 21609555), (3, 7203185), (5, 4321911), (11, 1964505), (15, 1440637), (19, 1137345), (33, 654835), (55, 392901), (57, 379115), (61, 354255), (95, 227469), (113, 191235), (165, 130967), (183, 118085), (209, 103395), (285, 75823), (305, 70851), (339, 63745), (565, 38247), (627, 34465), (671, 32205), (915, 23617), (1045, 20679), (1159, 18645), (1243, 17385), (1695, 12749), (2013, 10735), (2147, 10065), (3135, 6893), (3355, 6441), (3477, 6215), (3729, 5795)]