28869820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{331}}^1$

素因数の和:443

約数の個数: 72

約数和(自身を含む): 71532720

約数和(自身を除く): 42662900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 89, 98, 140, 178, 196, 245, 331, 356, 445, 490, 623, 662, 890, 980, 1246, 1324, 1655, 1780, 2317, 2492, 3115, 3310, 4361, 4634, 6230, 6620, 8722, 9268, 11585, 12460, 16219, 17444, 21805, 23170, 29459, 32438, 43610, 46340, 58918, 64876, 81095, 87220, 117836, 147295, 162190, 206213, 294590, 324380, 412426, 589180, 824852, 1031065, 1443491, 2062130, 2886982, 4124260, 5773964, 7217455, 14434910, 28869820]

約数ペア:

[(1, 28869820), (2, 14434910), (4, 7217455), (5, 5773964), (7, 4124260), (10, 2886982), (14, 2062130), (20, 1443491), (28, 1031065), (35, 824852), (49, 589180), (70, 412426), (89, 324380), (98, 294590), (140, 206213), (178, 162190), (196, 147295), (245, 117836), (331, 87220), (356, 81095), (445, 64876), (490, 58918), (623, 46340), (662, 43610), (890, 32438), (980, 29459), (1246, 23170), (1324, 21805), (1655, 17444), (1780, 16219), (2317, 12460), (2492, 11585), (3115, 9268), (3310, 8722), (4361, 6620), (4634, 6230)]