18851720

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:726

約数の個数: 64

約数和(自身を含む): 45757440

約数和(自身を除く): 26905720

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 31, 40, 46, 62, 92, 115, 124, 155, 184, 230, 248, 310, 460, 620, 661, 713, 920, 1240, 1322, 1426, 2644, 2852, 3305, 3565, 5288, 5704, 6610, 7130, 13220, 14260, 15203, 20491, 26440, 28520, 30406, 40982, 60812, 76015, 81964, 102455, 121624, 152030, 163928, 204910, 304060, 409820, 471293, 608120, 819640, 942586, 1885172, 2356465, 3770344, 4712930, 9425860, 18851720]

約数ペア:

[(1, 18851720), (2, 9425860), (4, 4712930), (5, 3770344), (8, 2356465), (10, 1885172), (20, 942586), (23, 819640), (31, 608120), (40, 471293), (46, 409820), (62, 304060), (92, 204910), (115, 163928), (124, 152030), (155, 121624), (184, 102455), (230, 81964), (248, 76015), (310, 60812), (460, 40982), (620, 30406), (661, 28520), (713, 26440), (920, 20491), (1240, 15203), (1322, 14260), (1426, 13220), (2644, 7130), (2852, 6610), (3305, 5704), (3565, 5288)]